Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...285..571m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 285, Oct. 15, 1984, p. 571-579.
Astronomy and Astrophysics
Astronomy
38
Astronomical Models, Bl Lacertae Objects, Continuous Spectra, Radio Sources (Astronomy), Ultraviolet Spectra, X Ray Sources, Compton Effect, Galactic Nuclei, Relativistic Particles, Synchrotron Radiation
Scientific paper
The continuous spectra of the nearby BL Lac objects Mrk 180 and Mrk 501 have been investigated by making coordinated observations at X-ray, ultraviolet, optical, and radio wavelengths. The observations were planned in order to obtain single-epoch snapshots, or time-frozen spectra, of the emission at many different wavelengths. The spectra were fitted with spherically symmetric, synchrotron self-Compton models and relativistic jet models with relaxed assumptions of spherical geometry and homogeneity and allowance for relativistic motion. It is found that these models provide accurate fits to the observed spectra and tighter constraints on the physical parameters. These models are also not dependent on uncertain source size and synchrotron break frequency.
Aller Hugh D.
Aller Margo F.
Hackney Karen R.
Hackney R. L.
Hutter Donald J.
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